Solve the ff: 1. What percent of 1600 is 2? 2. What is 0.001 percent of? 3. What percent of 4 is of 8? 4. 10 percent of 20 percent of 30 is? 5. 36 percent of 18 is 18 percent of what number? 6. What is the value of x if the average of 10, 11, 12 and x is 9?